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Trojan.PHP.MAILER.B

July 02, 2024
 Analysis by: John Rainier Navato
 ALIASES:

PHP:MassMail-A [Trj] (AVAST)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet


This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It does not have any propagation routine.

It does not have any backdoor routine.

It gathers certain information on the affected computer.

  TECHNICAL DETAILS

File Size:

5,642 bytes

File Type:

PHP

Memory Resident:

No

Initial Samples Received Date:

21 Jun 2024

Payload:

Steals information, Displays windows

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Rootkit Capabilities

This Trojan does not have rootkit capabilities.

Information Theft

This Trojan gathers the following information on the affected computer:

  • IP address
  • Web form data

Other Details

This Trojan does the following:

  • It enables its user to create and send an e-mail to target e-mail addresses using PHP library.
  • It displays the following web form to input custom data for e-mail creation purpose:
  • It connects to the following URLs to display images inside the webpage:
    • http://{BLOCKED}ave.com/wp/oIkQIOd.jpg
  • It sends the gathered information to a specific email address.

It does not exploit any vulnerability.

It requires being hosted on a web server in order to proceed with its intended routine.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

19.418.06

FIRST VSAPI PATTERN DATE:

21 Jun 2024

VSAPI OPR PATTERN File:

19.419.00

VSAPI OPR PATTERN Date:

22 Jun 2024

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Scan your computer with your Trend Micro product to delete files detected as Trojan.PHP.MAILER.B. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:


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